Presto (oz3840)

 

Presto (oz3840) by HE Hall from Aeromodeller 1952 - plan thumbnail

About this Plan

Presto. Control line team racer model.

Quote: "WHETHER for long-range medium speed or ER speed medium-range Class B team racing, the Presto is a good-looking speedster to take any 5 cc engine. A Frog 500 was used in the original, and following some experimentation with various props, it returned a regular 'best' of 73 mph with good range, using a PAW 8 x 8 propeller.

In musical terms, Presto means go as fast as possible, so if the name means anything to a model, Class B team race modellers would be wise to try this design for the next event.

Construction is best started with the mainplane by cutting rib templates of W.1 and W.6 in ply and cutting two sets of ribs by the sandwich method from 3/32nd sheet balsa blanks. One set must have holes for the lead-out wires. Shape the leading edge and pin to board so that - the taper gives dihedral effect. Add ribs, then upper sheeting and TE pieces. Take off board and complete sheeting, add bellcrank mount and assembly, lead-out wires and centre sheeting with the push-rod cleared by a slot. Attach tips, the starboard one containing ballast recessed inside.

Sand the whole and put aside whilst making the Tailplane assembly from a 1/16 in sheet sandwich. Actually two 13 x 3 x 1/16 in sheets will make the whole tail, with the tapered offcuts for the elevators. Add the horn assembly and cut out the fin.

Bend the undercarriage and bind firmly to 1/8 in ply former F.1. Cut out other Fuselage formers and drill hearers to suit your engine. Fit bearers through F.1 and F.2, add backbone to these and then fit other formers onto the backbone. Side pieces are next fitted..."

Quote: "The Presto was a team racer published in the August 1952 Aeromodeller. It was designed by H.E. Hall for the Class B event and, using a Frog 500, returned respectable results. The nice thing about Team Racers of the era is that they still looked like real craft and this one certainly is no different. As with all my drawings they are but CAD tracings from a scan of the original article. Remember always measure twice before even thinking of cutting. If you notice a mistake please drop me a line so I can rectify it."

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CAD file

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Presto (oz3840) by HE Hall from Aeromodeller 1952 - model pic

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Download File(s):
  • Presto (oz3840)
  • Plan File Filesize: 122KB Filename: Presto_BW_PDFvector_oz3840.pdf
  • Supplement Filesize: 1205KB Filename: Presto_BW_PDFvector_oz3840_article.pdf
  • CAD Zip Filesize: 385KB Filename: Presto_BW_PDFvector_oz3840_cad.zip
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Notes

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Scaling

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